package com.etongwl.customprogressbar;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

/**
 * @author 张东领
 * @自定义进度条
 */
public class CustomProgressBar extends View {
	/**
	 * 标签
	 */
	private final static String TAG=CustomProgressBar.class.getName();
	
	/**
	 * 画笔对象的引用
	 */
	private Paint paint;

	/**
	 * 圆环的颜色
	 */
	private int roundColor;

	/**
	 * 圆环进度的颜色
	 */
	private int roundProgressColor;

	/**
	 * 中间进度百分比的字符串的颜色
	 */
	private int textColor;

	/**
	 * 中间进度百分比的字符串的字体
	 */
	private float textSize;

	/**
	 * 圆环的宽度
	 */
	private float roundWidth;

	/**
	 * 最大进度
	 */
	private int max;

	/**
	 * 当前进度
	 */
	private int progress;
	/**
	 * 是否显示中间的进度
	 */
	private boolean textIsDisplayable;

	/**
	 * 进度的风格，实心或者空心
	 */
	private int style;

	public static final int STROKE = 0;
	public static final int FILL = 1;

	/**
	 * @param context
	 */
	public CustomProgressBar(Context context) {
		// super(context);
		this(context, null);
	}

	/**
	 * @param context
	 * @param attrs
	 */
	public CustomProgressBar(Context context, AttributeSet attrs) {
		// super(context, attrs);
		this(context, attrs, 0);
	}

	/**
	 * @param context
	 * @param attrs
	 * @param defStyle
	 */
	public CustomProgressBar(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		// 实例化画笔
		paint = new Paint();
		// 获取自定义属性
		TypedArray trpedAttrsArray = context.obtainStyledAttributes(attrs,
				R.styleable.RoundProgressBar);

		// 获取自定义属性和默认值
		roundColor = trpedAttrsArray.getColor(
				R.styleable.RoundProgressBar_roundColor, Color.RED);
		roundProgressColor = trpedAttrsArray.getColor(
				R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);
		textColor = trpedAttrsArray.getColor(
				R.styleable.RoundProgressBar_textColor, Color.GREEN);
		textSize = trpedAttrsArray.getDimension(
				R.styleable.RoundProgressBar_textSize, 15);
		roundWidth = trpedAttrsArray.getDimension(
				R.styleable.RoundProgressBar_roundWidth, 5);
		progress=trpedAttrsArray.getInteger(R.styleable.RoundProgressBar_progressnum, 0);
		max = trpedAttrsArray.getInteger(R.styleable.RoundProgressBar_max, 100);
		textIsDisplayable = trpedAttrsArray.getBoolean(
				R.styleable.RoundProgressBar_textIsDisplayable, true);
		style = trpedAttrsArray.getInt(R.styleable.RoundProgressBar_style, 0);
		trpedAttrsArray.recycle();
	}

	@Override
	protected void onDraw(Canvas canvas) {// 关键方法
		super.onDraw(canvas);
		/**
		 * 画最外层的大圆环
		 */
		int center=getWidth()/2;//获取圆心坐标
		int radius=(int)(center-roundWidth/2);//圆环的半径
		Log.e(TAG, "center="+center+",radius="+radius);//输出最外层大圆
		paint.setColor(roundColor);//设置圆环的颜色
		paint.setStyle(Paint.Style.STROKE);//设置空心
		paint.setStrokeWidth(roundWidth);//设置圆环的宽度
		paint.setAntiAlias(true);//消除锯齿
		canvas.drawCircle(center,center, radius, paint);//画圆
		
		 /** 
         * 画进度百分比 
         */  
		paint.setStrokeWidth(0);//设置宽度
		paint.setColor(textColor);//设置字体颜色
		paint.setTextSize(textSize);//设置字体大小
		paint.setTypeface(Typeface.DEFAULT);//设置字体
		int percent=(int)(((float)progress/(float)max)*100);//中间的进度百分百比，先转换为float在进行除法预算，不然可能出现0
		float textWidth=paint.measureText(percent+"%");//测量字体宽度，我们需要根据字体宽度设置在圆环中间
		if (textIsDisplayable&&percent!=0&&style==STROKE) {
			canvas.drawText(percent+"%",  center - textWidth / 2, center + textSize/2, paint);//画出进步百分比
		}
	
		
		 /** 
         * 画圆弧 ，画圆环的进度 
         */  
		//设置进度是空心还是实心
		paint.setStrokeWidth(roundWidth);//设置圆环的宽度
		paint.setColor(roundProgressColor);//设置进度的颜色
		RectF oval=new RectF(center-radius,center-radius, center+radius, center+radius);//用于定义的圆弧的形状和大小界限
		switch (style) {
		case STROKE:
			paint.setStyle(Paint.Style.STROKE);//
			canvas.drawArc(oval, 270, 360*progress/max, false, paint);//根据进度画圆弧
			break;
		case FILL:
			paint.setStyle(Paint.Style.FILL_AND_STROKE);//
			if(progress !=0)  
                canvas.drawArc(oval, 270, 360 * progress / max, true, paint);  //根据进度画圆弧   设置270度表示从正上方开始
			break;

		default:
			break;
		}
	}

	public synchronized int getMax() {
		return max;
	}

	/**
	 * 设置进度的最大值
	 * 
	 * @param max
	 */
	public synchronized void setMax(int max) {
		if (max < 0) {
			throw new IllegalArgumentException("max not less than 0");
		}
		this.max = max;
	}

	/**
	 * 获取进度.需要同步
	 * 
	 * @return
	 */
	public synchronized int getProgress() {
		return progress;
	}

	/**
	 * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步 刷新界面调用postInvalidate()能在非UI线程刷新
	 * 
	 * @param progress
	 */
	public synchronized void setProgress(int progress) {
		if (progress < 0) {
			throw new IllegalArgumentException("progress not less than 0");
		}
		if (progress > max) {
			progress = max;
		}
		if (progress <= max) {
			this.progress = progress;
			postInvalidate();
		}

	}

	public int getCricleColor() {
		return roundColor;
	}

	public void setCricleColor(int cricleColor) {
		this.roundColor = cricleColor;
	}

	public int getCricleProgressColor() {
		return roundProgressColor;
	}

	public void setCricleProgressColor(int cricleProgressColor) {
		this.roundProgressColor = cricleProgressColor;
	}

	public int getTextColor() {
		return textColor;
	}

	public void setTextColor(int textColor) {
		this.textColor = textColor;
	}

	public float getTextSize() {
		return textSize;
	}

	public void setTextSize(float textSize) {
		this.textSize = textSize;
	}

	public float getRoundWidth() {
		return roundWidth;
	}

	public void setRoundWidth(float roundWidth) {
		this.roundWidth = roundWidth;
	}

}
